Award Data

TO DEFINE, DESIGN, AND BUILD PROTOTYPE HARDWARE AND SOFTWARE TO ENABLE A PILOT OR GUNNER TO USE HUMAN VOICE TO RECEIVE AUTOMATIC STATUS REPORTS, GIVE COMMANDS TO, AND QUERY ARMAMENT, AIRCRAFT, AND FLIGHT INSTRUMENT FUNCTIONS. HARDWARE WILL BE CONSTRUCTED ON A MODULAR BASIS CONSISTING OF A SPEECH OUTPUT ADVISOR AND A LOW MEMORY REQUIREMENT (LMR) VOICE/UTTERANCE RECOGNIZER. THE LMR VOICE/UTTERANCERE ...

OPTOELECTRONIC SOURCES, INTEGRATED AS MONOLITHIC ELEMENTS ON SILICON VLSI CHIPS, OFFER IMPORTANT ADVANTAGES IN THE TRANSMISSION OF INFORMATION WITHIN THE CHIP OR BETWEEN CHIPS IN ADVANCED COMPUTER SYSTEMS. THE SPEED OF OPTICAL-INTEGRATED VLSI DEVICES IS EXPECTED TO BE CONSIDERABLY HIGHER THAN EQUIVALENT VLSI WITH METALLIC INTERCONNECTS, DUE TO ABSENCE OF THE RC DELAY INHERENT IN THE METALLIC CONDU ...

THE ULTIMATE HIGH-EFFICIENCY CRYSTALLINE SILICON SOLAR CELL DESIGN CONSISTS OF A THIN FILM OF ELECTRICALLY-ACTIVE SILICON EPITAXIALLY GROWN ON AN OXIDE-OVERCOATED, INFRARED-TRANSPARENT GALLIUM PHOSPHIDE (GAP) SUBSTRATE. IN ADDITION TO HIGH CONVERSION EFFICIENCY AND INTRINSIC RADIATION RESISTANCE DUE TO THE THIN ACTIVE LAYERS, THIS NOVEL DESIGN HAS SEVERAL UNIQUE PERFORMANCE ENHANCING FEATURES. THE ...

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THE SODIUM HEAT ENGINE (SHE) IS AN EFFICIENT DEVICE FOR THE DIRECT CONVERSION OF THERMAL ENERGY TO ELECTRICAL ENERGY. THE DEVICE HAS HIGH SPECIFIC POWER BOTH ON A VOLUME AND WEIGHT BASIS, HIGH CONVERSION EFFICIENCY WHICH IS INDEPENDENT OF SIZE, AND NO MOVING PARTS WHICH IMPLIES POTENTIALLY HIGH RELIABILITY. THESE ATTRIBUTES MAKE THE SHE AN ATTRACTIVE DEVICE FOR SDI APPLICATIONS. ALTHOUGH THE PRINC ...

IT IS PROPOSED THAT NEW CERAMIC MATERIALS WITH POTENTIAL FOR STRENGTH AND TOUGHNESS RETENTION TO ELEVATED TEMPERATURES WILL BE FABRICATED AND CHARACTERIZED. THESE NEW CERAMIC MATERIALS EXHIBIT A PHENOMENON KNOWN AS FERROELASTICITY. THE PHENOMENON OF FERROELASTICITY IS VERY SIMILAR TO THAT OF FERROELECTRICITY AND FERROMAGNETISM. THE FERROELASTIC STATE IS CHARACTERIZED BY THE EXISTENCE OF AT LEAST T ...

IF A SERIES OF MATERIALS CAN BE ENGINEERED HAVING METAL TO INSULATOR OR METAL-TO-SEMICONDUCTOR TRANSITION AT A SPECIFIC DESIRED TEMPERATURE, THEN THESE MATERIALS WILL PAVE THE WAY FOR A VARIETY OF APPLICATIONS. ONE SUCH APPLICATION IS A HIGH CURRENT, SOLID STATE, RELIABLE SWITCH. IT IS PROPOSED TO DEVELOP SUCH MATERIALS USING TIO2-VO2 SOLID SOLUTION. THE HIGH TEMPERATURE RUTILE STRUCTURE OF VO2 IS ...

DEVELOPMENT AND APPLICATION OF A MICROCIRCUIT GRID TECHNIQUE FOR MEASURING CRACK LENGTHS IN FATIGUE CRACK GROWTH TEST SPECIMENS IS DESCRIBED. CRACK LENGTH IS DETERMINED FROM STEPWISE CHANGES IN THE VOLTAGE OUTPUT OF THE GRID CIRCUIT CAUSED BY THE SEQUENTIAL RUPTURE OF THE MICROSTRIPS BY THE ADVANCING CRACK TIP. THE ADVANTAGES OF THE GRID TECHNIQUE AS COMPARED TO OTHER TECHNIQUES FOR MONITORING CRA ...

SOME CERAMICS HAVE VERY HIGH TEMPERATURE STABILITY AND STRENGTH COMPARED TO STRUCTURAL METALS AND HAVE POTENTIAL TO BE USED UNCOOLED IN ADVANCED GAS TURBINE ENGINES. ONE CANDIDATE FAMILY OF CERAMICS WITH AN ESPECIALLY GOOD COMBINATION OF THERMAL PROPERTIES AND POTENTIAL MECHANICAL PROPERTIES IS SILICON NITRIDE. RECENTLY DEVELOPED ALLOYS OF SILICON NITRIDE LOOK PARTICULARLY PROMISING, BUT REQUIRE F ...

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